A window through the walls of our classroom. This is an interactive learning ecology for students and parents in my Pre-Cal Math 20S class. This ongoing dialogue is as rich as YOU make it. Visit often and post your comments freely.

Wednesday, December 3, 2008

In today's class, we started off with the Pre-Test. When our time was up, we were put into groups. In our groups, we were given 15 minutes to work together in getting the best/right answer. We then worked together on the answers. One of the people from the group was to be the spy for a minute. The spy could go anywhere around the room and ask other groups about the questions they had difficulty on. When the minute was up, he gave up an extra 4 minutes to finish up the Pre-Test and hand in one paper from each group with all the people from the group's names.

The Answer for this was B.

3.5 x 4 x 1/4 = 3.5 cm

In the beginning, I actually thought that this question was easy. That I just had to multiply 3.5 cm by 4.0 cm and then divide it by a half because of the scale factor of 1:2 which I thought meant to just divide by 1/2. It actually means that the area changes by (1/2)^2.

The Answer for this was C.

Formula for the Surface Area of a Sphere: 4pr²

In this question, you should just know the formula for a Sphere which is 4pr². After that, you just plug in the radius. It is C because A is a Volume Formula for the Sphere. It cannot be B or D because B doesn't have the square after the radius and D has a cube instead of a square.

The Answer for this was 190 km.

There was not just one way this could have been done. The way that Mr. Kuropatwa did it was like this.

x = 19 000 000 cm= 190 km

The way that I did it was what I learned in Science.

In 1 m, there is 100 cm.

In 1 km, there is 1 000 cm.

First, I multiplied 3.8 by 5 000 000 which equaled to 19 000 000 ( cm ).I then divided 19 000 000 by 100 making me get 190 000 ( m ).After that, I divided one more time. I divided 190 000 by 1 000 causing it to be 190 km.

For the Last question, I understood it the same way we did it in class. It will be easier to check the blog so I'll be leaving it there. I apologize for not writing it down here. Well this is my scribe and I'm sorry that it's late.

Good Luck with the TEST TOMORROW!

Like Mr. Kuropatwa says, " You can have lucky charms ; they are magically delicious. You can also have a rabbit's foot ; but not a real rabbit's foot because that would be cruel. "